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TextChangedEvent Field

TextPattern.TextChangedEvent Field

Identifies the event raised whenever textual content is modified.

Namespace:  System.Windows.Automation
Assembly:  UIAutomationClient (in UIAutomationClient.dll)

public static readonly AutomationEvent TextChangedEvent

This identifier is used by UI Automation client applications. UI Automation providers should use the equivalent field in TextPatternIdentifiers.

// Initialize a text changed listener. 
// An instance of TextPatternRange will become invalid if  
// one of the following occurs: 
// 1) The text in the provider changes via some user activity. 
// 2) ValuePattern.SetValue is used to programatically change  
// the value of the text in the provider. 
// The only way the client application can detect if the text  
// has changed (to ensure that the ranges are still valid),  
// is by setting a listener for the TextChanged event of  
// the TextPattern. If this event is raised, the client needs  
// to update the targetDocumentRange member data to ensure the  
// user is working with the updated text.  
// Clients must always anticipate the possibility that the text  
// can change underneath them.
Automation.AddAutomationEventHandler(
    TextPattern.TextChangedEvent,
    targetDocument,
    TreeScope.Element,
    TextChanged);

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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